What i want: AMD Phenom II X4 965 Black Edition 3.4GHz 125W
The socket is AM3 so it is alright, but my problem are the Watts, if you check the motherboard specs it says "Support CPU up to 95W" and now i am worrying if i put this new CPU will my motherboard burn after a week? Can someone help me? Or give me an option?
Best option only use CPUs on the supported CPU list. You could try to undervolt the 965 and maybe need to underclock aswell to get the power down or it may run OK just with the board hotter than it should be, or may just not work or like you say just burn out the board. My brother unlocked an Athlon 440 to 4 cores (making it 125W) on a board that only supports 95W CPUs and it runs OK but the board runs hot & no overclock is stable..
Going here http://www.asus.it/Motherboards/AMD_AM3/M4A78LTM_LE/#CP... you'll see that there are no 125W CPU's listed as supported. As far as quad core CPU's you look to be limited to the Phenom IIX4 960T as the best supported. There are two 6 core 95W CPU's listed, you might look into one of those also.
Hope it helps